Swapping the black ink on the Epson 7800 and 9800Save ink on the 'official method' Photo to Matte or Matte to PhotoUse this procedure with care! - use at your own risk An unofficial black ink change technique for the Epson SP9800 and SP7800 - we've not tried this on the 7880 or 9880
Do bear in mind that the driver choices are often limited by the ink, so while your profiles may be made for Pk ink, then if the driver thinks the printer has Mk ink in it, it may produce unpredictable results. I've seen this trick discussed various places and have seen people question its use for some settings and papers.
Swapping black inks on an 7800/9800This method is not so easy as with the 7600/9600 technique
The amount required to purge the old black depends on your printer. The SP7800 uses about 10-12ml of ink before the tube is flushed out. Printing a solid black image of 23"x40" should suffice When you look at the finished print you see that 2/3 is matte ink as it looks dark and the rest of the print looks a little dull with Pk ink on matt paper. The system is now charged with photo black. The SP9800 uses about 20-22ml of ink. The black image is 43"x40". If you consider that an ink change the 'official way' wastes appreciably more ink, you can see why there is such a huge saving. If you've wondered what over a hundred pounds worth of waste ink looks like - see here :-) Note -- On our 9600 we printed four 40"x10" solid black rectangles on cheap matt paper to purge the black line. The first 3 were a dark black and the third much lighter as the Photo black ink was used. Cleaning dried inkYou really only need to check out the household products line at your local supermarket ;-) I've written a short guide about 'cleaning inkjet printers' Other info pages
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